Category Archives: Development

Simon pointed me at this document that should make for good reading tomorrow morning. zzzz. I’m off to bed, ‘night!

I’m still working away at a registration process using the MVC pattern. It’s coming along very nicely in fact! Here’s an article describing it in some depth.
I’ve hijacked the idea somewhat for my project. I have one controller, and multiple views/models. There’s one model and view for each page. The view is split between PHP code and Smarty templates. The PHP code doesn’t do much beyond assigning variables for the Smarty templates but I wouldn’t put those assign calls into the model, as then the model would have to know about Smarty. This makes it easy to figure out where something is going wrong, and where I need to _put_ code.
How many of you have “super” classes with thousands of lines of code? That sucks for maintainability.
While some of the Java examples I’ve seen redirect the browser to the new view, I simply unset the old model and view and create the new model and view. The single solitary display() call at the end of the controller takes care of displaying whatever view is active!
Must post some example PHP code later.

Looks like I’ll have to update my Install-Sendmail script again. I was sent a Polish translation last week, but the script fails in Red Hat 9 because the hash command requires different parameters now.

Recently I fixed the Sendmail configuration on one of our boxes, and I’m now inundated daily with over 1700 return mails from old and expired email addresses. This is the second day so I decided to combat it:

1. Create a procmail script to redirect all the bounced mails into a file.
2. Grab all the email addresses from that file and create SQL statements to disable sending mail to those users of our site.

With Google’s help, I came up with the following procmail recipe, and stuffed it into my .procmailrc:

:0
* ^From: .*MAILER-DAEMON.*
* ^Subject:.*(Undeliverable|failure notice|Returned mail:|Delivery (Status )?Notification|Mail System Error|Delivery fail|Nondeliverable mail|Message status – undeliverable|Mail Delivery Problem|Notification d’état de la distribution).*
RETURNS

That should catch almost all the returns sent to my inbox.
I used the following code to extract the emails from the RETURNS file. It can probably be done better, but this works well enough.

awk -F “< " '// {print $2}’ ” ‘{print $1}’| sort|uniq

I then grep out bogus lines such as the ones smtp servers add, opened the file in vi and added SQL statements around each email address. I expect a lot less email in my inbox tomorrow..

Here’s a handy online regex tester if you want to test a regular expression easily.

Ah! The joys of Sendmail cf configuration. How arcane can the following get?

R$+ $@ $>93 $1

That line tells Sendmail to masquerade the headers of an email as another domain. Luckily I just generated another sendmail.cf with my install-sendmail script and did a vimdiff of both files. Comments are helpful too, and takes some of the bite out of the .cf file.

I guess Jeremy never said it explicitly but I (and probably lots of others) assumed Yahoo Finance used MySQL in the delivery of data, but it’s only used in the back-office which is a lot different!
Where I work, Tradesignals.com, uses MySQL to store our market data and it’s obviously used to deliver data. Then again, the Futures stock market is a lot smaller than the range of data Yahoo offers. While I can’t reveal how much data we go through, American futures trading generate a lot of information!

Padraig Brady posted a script to generate the best options for your CPU. Padraig saw “speedups of over 300% in integer code by compiling for i686 over i386” which is impressive!
Niall O Broin replied shortly afterwards with a patch if you’re using a GCC above version 3.2

A Long list of differences. One of these days I’ll learn enough Python to comment on these statements!

Last month I mentioned the LABEL tag. It makes forms so much more usable! It took me until today to try it out and it’s wonderful! Thanks Simon for pointing this out to me!

Kernel Trap reports on recent activity to make Linux more responsive. It’s looking good!

I’d handwavingly describe both your patch and sched-2.5.64-a5 as 80% solutions, and the combo 95%.” Robert Love agreed, “This is great for me, too. I played around with some mp3 playing and did the akpm-window-wiggle test. It is definitely the smoothest.”